Transport and trapping of photocharges in liquid crystals placed between photoconductive polymer layers

Mun, Junho; Yoon, Choon Sup; Kim, Hyun-Wuk; Choi, Su-An; Kim, Jong-Duk
September 2001
Applied Physics Letters;9/24/2001, Vol. 79 Issue 13
Academic Journal
The transport and trapping of photocharges in liquid crystals placed between photoconductive polymer layers was investigated systematically. The transport of the photocharges is explained in terms of current paths that are formed along the bright sites of an interference pattern. Our study shows clearly that charge trapping occurs predominantly in the photoconductive poly(N-vinylcarbazole) layers and not in the insulating poly(vinyl alcohol) layers, contrary to a previous report. © 2001 American Institute of Physics.


Related Articles

  • Very high time-of-flight mobility in the columnar phases of a discotic liquid crystal. Iino, Hiroaki; Hanna, Jun-ichi; Bushby, Richard J.; Movaghar, Bijan; Whitaker, Benjamin J.; Cook, Michael J. // Applied Physics Letters;9/26/2005, Vol. 87 Issue 13, p132102 

    1,4,8,11,15,18,22,25-Octaoctylphthalocyanine shows the highest time-of-flight (“long-range”) hole mobility so far reported for the columnar phase of a discotic liquid crystal. Unlike most other high long-range mobility columnar discotics, there is no clear evidence from x-ray...

  • Highly polarized white-light emission from a single copolymer based on fluorene. Zhu, D. X.; Zhen, H. Y.; Ye, H.; Liu, X. // Applied Physics Letters;10/20/2008, Vol. 93 Issue 16, p163309 

    Polarized white-light emission was realized from a single copolymer with green and red-light-emitting chromophores incorporated into the blue-light-emitting poly(9,9-dioctylfluorene) backbone through intrachain energy transfer. Based on the good thermal stability and nematic liquid crystalline...

  • Special issue: liquid crystals. Litster, J. David // Physics Today;May82, Vol. 35 Issue 5, p25 

    Introduces a series of articles about liquid crystals from the March 1982 issue of 'Physics Today.'

  • Experimental and calculated results for the dynamics of oriented nematics with twist angles from 210° to 270°. van Sprang, H. A.; Koopman, H. G. // Journal of Applied Physics;11/15/1988, Vol. 64 Issue 10, p4873 

    Deals with a study on the switching of nematic liquid crystals with high twist, high tilt director configurations for step-voltage and pulse-voltage addressing. Method to calculate director pattern; Transmission-wavelength spectra; Calculation of responses to voltage pulses of various widths.

  • Nematic liquid crystal clad tapered optical fiber with temperature sensing properties. Veilleux, C.; Black, R. J.; Lapierre, J.; Reeves, L. W. // Journal of Applied Physics;6/1/1990, Vol. 67 Issue 11, p6648 

    Presents information on a study which discussed the thermal and optical properties of the lyotropic liquid crystal decylammonium chloride/water/NH[sub4]Cl (DACl-LLC). Thermal and optical properties of DACl-LLC; Discussion on bitapered fiber sensitivity to external index variation; Temperature...

  • Tristable nematic liquid-crystal device using micropatterned surface alignment. Kim, Jong-Hyun; Yoneya, Makoto; Yokoyama, Hiroshi // Nature;11/14/2002, Vol. 420 Issue 6912, p159 

    It has long been appreciated that liquid-crystal (LC) devices in which the LC molecules adopt multiple stable orientations could drastically reduce the power consumption required for highinformation-content displays. But for the commonly used nematic LCs, which are intrinsically uniaxial in...

  • Tumbling instability in a shearing nematic liquid crystal: Analysis of broadband dielectric results and theoretical treatment. Zakharov, A. V.; Vakulenko, A. A.; Thoen, J. // Journal of Chemical Physics;3/1/2003, Vol. 118 Issue 9, p4253 

    The rotational diffusion coefficient D[sub ⊥], the rotational viscosity coefficients γ[sub i] (i=1,2), and the orientational relaxation time τ[sub 00][sup 1] are investigated. γ[sub i] are calculated by a combination of an existing statistical–mechanical approach and of...

  • Dynamic Photorefractivity in Nematic Liquid Crystal Cells with Photoconductive Orienting Layers. Agashkov, A. V.; Kovalev, A. A.; Parka, J. // Optics & Spectroscopy;Jun2005, Vol. 98 Issue 6, p938 

    A new mechanism of photorefractivity in nematic liquid crystal cells with photoconductive orienting layers, referred to as dynamic photorefractivity, is proposed. The essence of this mechanism is as follows: an external ac electric field excites quasi-periodic subgratings at the interface...

  • Four-domain twisted nematic liquid crystal display fabricated by reverse rubbed polyimide process. Chen, J.; Bos, P. J.; Johnson, D. L.; Bryant, D. R.; Li, J.; Jamal, S. H.; Kelly, J. R. // Journal of Applied Physics;8/15/1996, Vol. 80 Issue 4, p1985 

    Presents a study that discussed the realization of a four-domain twisted nematic (TN) display by a reverse rubbing technique that should be suitable for mass production in the display industry. Background on single-domain TN cells and the limitations of TN liquid crystal displays; Analysis of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics